A researcher has shown how easy it is to hack into a car and start it.

The technique of redirecting communications between a car and its owner was demonstrated by Sultan Qasim Khan, a security consultant at security firm NCC Group.

Two small devices that are able to relay wireless communications, which cost $100 total and can be easily bought online, were used by the researcher during his demonstration.

An attacker could walk up to any home at night if the owner's phone is in the house, and use the attack to start the car.

The attacker can send commands from anywhere in the world once the device is in place.

Easy Way In

The hack is unique to specific models of the company, and it's not clear if it has been used to steal vehicles in the past.

According to Khan, the issue wasn't significant enough to warrant the required hardware changes, despite the security risks.

A technology called BLE is used to establish a connection between the phone and the car. According to Khan, the protocol has been exploited by hackers in the past to gain access to phones and laptops.

The vulnerability shows that smart home devices and even cars can be manipulated into giving hackers free reign.

ThePIN to Drive feature thatTesla has could give owners a way to protect themselves from hacks.

It's not clear how many owners use that feature.

A hacker shows off a way to get into cars.

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